How the data is licensed.

Licensed by the many venues we work with. We collect, engineer and supply their data to clients under those agreements. Scope, permitted use and any redistribution rights are set in each client's order form.

Derived datasets are aggregates and scores computed from market data. Their permitted use is set in the client agreement.

Access to this website does not grant a licence to copy, redistribute, resell or commercially use any dataset, API, software or derived output described here. Charts and sample outputs on this website use synthetic data unless a page clearly states otherwise.

Qelso is an independent data engineering company. It is not operated or endorsed by any prediction-market venue, and venue names are used only to describe the markets we cover.